一段神奇的代码

# -*- coding: utf-8 -*-
# @Time    : 2019/4/21 17:13
# @Author  : Just
# @Email   : 1785780475@qq.com
# @File    : testCSS.py
import threading
import time


class test(object):
    _instance_lock = threading.Lock()

    def __init__(self,name):
        self.name = name

    def __eq__(self, other):
        return self.name == other.name

    def __hash__(self):
        return hash(self.name)

    def __new__(cls, *args, **kwargs):
        with cls._instance_lock:
            if not hasattr(cls,'_instance'):
                cls._instance = object.__new__(cls, *args, **kwargs)
            return cls._instance

    def __call__(self,func, *args, **kwargs):
        def inner(*args, **kwargs):
            start_time = time.time()
            result = func(*args, **kwargs)
            end_time = time.time()
            print('speend time:',end_time-start_time)
            return result
        return inner